In the dwindling weeks before A.T.P. tennis kicks it into high gear—Wimbledon begins next month—filmmakers Maiken Baird (Client 9: The Rise and Fall of Eliot Spitzer) and Michelle Major bow a powerful new documentary examining the unique lives of Venus and Serena Williams, two of the sport’s all-time greatest players. Venus and Serena—which includes rare footage from the girls’ youngest days, learning the sport from their father, Richard Williams, in Compton, California—was made over nine months of 2011 and spans the health struggles, personal triumphs, family dramatics, and stylistic verve of the two.

In honor of Baird and Major’s work, Vanity Fair’s Graydon Carter and Vogue’s Anna Wintour hosted the filmmakers, tennis stars, and fashionable sports enthusiasts for cocktails Thursday night at the Beatrice Inn. The crowd—which included Constance Jablonski, Rachel Roy, Derek Blasberg, Gay Talese, and others—next attended a screening and dinner hosted by Billie Jean King and John McEnroe. See photos of the evening’s guests, and to read more about the film, check out its official site here, or see it in theaters or on-demand starting May 10.